How to Grow Spearmint

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Spearmint

Mentha spicata

herb

Spearmint is a perennial herbaceous plant known for its aromatic, lance-shaped leaves and refreshing flavor. It produces small purple, pink, or white flowers and spreads vigorously via underground runners. This hardy mint variety is one of the most commonly cultivated culinary mints.

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Example Spearmint timeline · Pittsburgh, PA (Zone 6b)

Plant Spearmint
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Spearmint
Around May 17

≈ 30 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Spearmint dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun to partial shade; prefers 6+ hours of sunlight daily but tolerates shade

💧

Water: Keep soil consistently moist but not waterlogged. Water regularly during growing season; reduce in winter. Prefers moisture but is drought-tolerant once established

📏

Spacing: 12-18 inches

📅

Days to maturity: 30-45 days to first harvest; continuous harvest thereafter

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Planting depth: 0.25 inches for seeds; plant transplants at soil level

Soil

Type: Well-draining loamy soil, tolerates poor soil conditions

pH: 6.0-7.0

Amendments:

Compost Organic matter Peat moss

Growing Zones

Find your zone →

Thrives in zones 3-9; extremely cold and heat tolerant

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

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Growth Stages

Seedling

2-3 weeks

Tiny leaves emerge with delicate stems; plants are fragile and small

Keep soil moist but not waterlogged. Provide bright light. Thin seedlings to proper spacing once true leaves appear

Vegetative Growth

4-6 weeks

Rapid expansion of stems and lance-shaped leaves; plant develops bushy appearance with multiple stems

Pinch back growing tips to encourage bushier growth. Water consistently. Apply balanced fertilizer monthly if desired

Flowering

Throughout growing season

Slender flower spikes appear with small purple, pink, or white tubular flowers arranged in whorls

Harvest leaves before flowering for best flavor, or deadhead flowers to prolong foliage production

Mature Plant

Ongoing once established

Full, dense plant with many stems and abundant foliage; may spread via runners if in ground

Regular harvesting encourages new growth. Divide plants or control runners every 2-3 years. Cut back in late fall

Dormancy

3-4 months in cold climates

Above-ground growth dies back in winter; underground runners survive to re-sprout in spring

Cut plant to ground level in fall. Mulch in colder zones for extra protection. Do not water excessively

Companion Planting

Plan your garden →

Plant with:

Tomato Cabbage Cauliflower Radish Lettuce Carrot Pea Chamomile

Avoid planting near:

Other mints (cross-pollination concern) Parsley Rue

Common Pests

Spray with neem oil or insecticidal soap; increase humidity
Spray with water jet or use insecticidal soap; introduce ladybugs
Remove affected leaves; improve air circulation; avoid overhead watering
Use yellow sticky traps; spray with neem oil or insecticidal soap
and
Hand-pick; use copper barriers; apply diatomaceous earth around base

Uses

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Tea, beverages & desserts

Culinary

Spearmint leaves brew into refreshing herbal tea and flavor mojitos, lemonades, smoothies, and desserts. Fresh leaves add cooling flavor to many dishes without the sharp punch of peppermint. [source]

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Savory dishes & sauces

Culinary

Use fresh or dried spearmint in Middle Eastern cuisine, yogurt sauces, chutneys, and savory meat dishes. Pairs well with lamb, fish, and grain-based dishes. [source]

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Digestive aid & comfort

Medicinal

Spearmint tea aids digestion, soothes upset stomachs, and may help reduce bloating and cramping. Traditionally used for digestive complaints and general wellness. [source]

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Freshener & cleaner

Household

Dried spearmint adds fragrance to homes, potpourri, and sachets. Can be used in homemade cleaning products for its mild antibacterial properties and fresh scent. [source]

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Pollinator attraction

Wildlife

Spearmint flowers attract bees, butterflies, and other beneficial insects to the garden, supporting pollination and garden ecology. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest leaves anytime once plant is 6+ inches tall by pinching off the top 2-3 sets of leaves. Regular harvesting encourages bushier growth. Best flavor is in early morning before heat. For dried mint, cut stems just before flowering. Can harvest multiple times per season. Perennial roots allow for years of harvesting

Fun Facts

🌱 Spearmint is less aggressive than peppermint and spreads via runners, making it easier to control in gardens when contained in pots or planters
🌱 The characteristic fresh flavor comes from carvone, a monoterpene that gives spearmint its distinctive minty taste without the cooling sensation of peppermint's menthol
🌱 Spearmint has been cultivated for over 2,000 years and was valued by ancient Romans and Greeks for both culinary and medicinal purposes

Gardening Terms

New to gardening? Learn about terms used in this guide:

Deadhead Full Sun Mulch Partial Shade Perennial Pinch Back Runner True Leaves

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